Air circulating heater and furnace



Feb. 3, 1953 s. D. TATE 2,627,265

AIR CIRCULATING HEATER AND FURNACE Filed May 17, 1949 3 Sheets-Sheet l sR a m a N N m m m N a T 1 TH .N D s m w. m \n s V. B 9 N o FIG.3.

r s. D. TATE AIR CIRCULATING HEATER AND FURNACE Feb. 3, 1953 3Sheets-Sheet 2 Filed May 17, 1949 h'lIIIlI'lI/IIIIIIIlIII!IIIIIIIIIIIIIIIIIIIIIIIJ'III'I:

FIG.5.

INVENTOR. Syllus D. Tate 4 e l Anon EYS Feb. 3, 1953 s. m. TATE2,627,265

' AIR CIRCULATING HEATER lAND FURNACE Filed May 17, 1949 3'Sheets-Sheet5 INVENTOR. Syllus D. Tote BY ATTORNEYS Patented Feb. 3, 1 953 UNITEDSTATES PATENT OFFICE AIR. CIRCULATIN G HEATER AND FURNACE Syllus D.Tate, Centralia, Ill.

Application May 17, 1949, Serial No. 93,788

2 Claims.

The present invention relates to improvements in an air circulatingheater and furnace and has for an object the provision of a device ofthis kind in which the air is more effectively heated and bettercirculated than heretofore.

' Another object of the present invention is to provide an improvedheater and furnace in which the air heating chamber or oven is entirelyenclosed by the casing which contains the heating unit and the heatedair compartment completely encloses the stove or heater containingcasing.

A further object of the present invention is to provide an improvedstructure of this character in which the cool air intake for the ovenextends through the heating unit so that the cool air is preheatedbefore it is delivered to the oven.

A still further object of the present invention is to provide animproved heater and furnace in which means are incorporated forretaining the incoming cool air in the lower part of the oven so that itwill be subjected directly to the heat from the heating unit for alonger period.

The present invention aims to provide an improved structure of thischaracter in which the oven is fume-tight and air-tight from the heatercasing so that the air heating chamber is sealed off from any fumes fromthe burner.

The present invention also aims to provide an improved heater andfurnace in which the gas fumes and the heat from the burner are causedto travel up through the space between the oven walls and the walls ofthe heater casing through baffles so that these walls will retain theheat for a longer period of time.

The present invention contemplates providing an improved structure ofthis type in which, means are provided for effecting a forcedcirculation of the heated air into the rooms to be heated and that ablower is utilized for feeding fresh cool air to the oven chamber.

With the foregoing and other objects in view, the invention will behereinafter more fully described and more particularly pointed out inthe appended claims.

In the drawings, in which the same parts are denoted by the samereference numerals throughout the several views,

Figure l is a perspective view of the improved device constructed inaccordance with the present invention and with parts broken away and insection,

Figure 2 is a side elevational view of the same with parts broken awayand in section,

Figure 3 is a bottom plan view of the fresh air spreader,

Figure 4 is a sectional view taken on the line 4--4 of Figure 1 andlooking in the direction of the arrows,

Figure 5 is a sectional view taken on the line 5-5 of Figure 2 andlooking in the direction of the arrows,

Figure 6 is a top plan view of the burner unit with parts broken away,

Figure '7 is a front elevational view of the burner, and

Figure 8 is a perspective view of the improved device with parts brokenaway showing piping for conducting heated air to remote rooms or thelike.

Referring more particularly to the drawings, an outer shell, generallyindicated at A, comprises a top H], a bottom II, a front wall 12, a rearwall !3 and side walls 14 and I5. This outer shell is adapted to besupported by legs It on a door or the like of a building so that thebottom H is disposed in vertically spaced relation to the floor. Thelower edge portions of the front, back and side walls of the outer shellbetween the legs I5 are cut away as at H and the front and rear and sideedge portions of the bottom II are cut away as at l8 in alignment withthe corresponding cut away portions I! to permit air to passtherethrough. The upper portions of the sides Hi and I5 of the shell areprovided with perforations l9 and 20 and the top Id of the shell isprovided with similar perforations 2|.

A stove or heater containing casing, generally indicated at B, ismounted within the outer shell A and comprises a top 22, a bottom 23, afront wall 24, a rear wall 25 and side walls 26 and 2?. The heatercasing is supported within the outer shell by any suitable number ofbrackets 28 and 29 which may be in the form of angle irons or the like.The vertical leg of each bracket 28 is secured to the inner face of theside wall 14 of the outer shell and its horizontal leg is secured to thebottom 23 or the heater casing by rivets or the like. Similar brackets28 may be secured to the opposite side wall H: of the outer shell and tothe bottom 23 of the heater casing. The brackets 29 may have theirvertical legs secured to the inner faces of the side walls I4 and l5,respectively, of the outer shell and the outer face of the top 22 of theheater casing by the rivets or the like. i A

The bottom 23 of the heater casing is provided with perforations 3!) sothat the air which passes through the cut away portions i1 and I8 of theouter shell can enter the heater casing to supply the air necessary tosupportcombustion. for a stove or heating unit 3|. The heating unit 3|is a somewhat box-like structure and comprises an upper wall 32, abottom wall 33, side walls 34 and front and back walls 35 and 36,respectively. The heating unit 3| is divided into transversely extendingcompartments 31 by partitions 38 which extend between and are secured tothe side walls 34 and the upper and lower walls 32 and 33. The upperwall 32 is provided with apertures 39.

A pipe 49 is adapted to have one end connected to a suitable source ofnatural or manufactured gas and its opposite end terminates in twobranches, each of which comprises two sections 4| and 42. The sections4| of each branch are disposed at an angle of the order of fortyfivedegrees to the pipe 40 and to the sections 42 which are disposedsubstantially parallel to the pipe 49. The sections 4| and 42 areprovided with burners 43, two of which are received by each compartment31 by being received through appropriate openings in the lower bottomwall 33. An auxiliary pipe 44 has one end connected to the pipe 49 andits opposite end communicates with a pilot burner 45. Suitable valves 49and 41 are provided for controlling the supply of gas through the pipes45 and 44, respectively.

An oven, generally indicated at C, is disposed within the stove orheater containing casing B 1 may be located at any desirable point, butin the present illustration are shown to be substantially centrallydisposed. The upper outlet end of the fresh air conduit 54 is receivedby a suitable opening in the bottom 49 of the oven C so that the freshair will be delivered to the interior of the oven. This opening in thebottom 49 of the oven may be disposed substantially centrally thereof.

A fresh air spreader, generally indicated at 57, is supported by thebottom 49 of the oven in vertically spaced relation to the outlet end ofthe conduit 54. The spreader 51 comprises a plate 58 from the undersurface of which projects a cone shaped member 59 having facets 60. Theapex of the cone is disposed slightly above and substantially centrallyof the outlet of the conduit 54. Vanes 6| radiate outwardly from thecone shaped member 59 and have their upper edges attached to the undersurface of the plate 58 and their bottom edges attached, as by weldingor the like, to the upper surface of the bottom 49 of the oven C. Eachvane 6| has two longitudinally curved portions 92 and 63 which are thereverse of each other. Brackets 64 which are similar to brackets 28 and29 are secured to the inner faces of the side walls 25 and 2'! of thestove or heater containing casing B and to the top and bottom 48 and 49,respectively, of the oven C for supporting the oven within the heatercasing B.

Pipes 55 extend through suitable aligned openings in the side walls 25and 59 and 2'1 and of the heater casing B and oven C, respectively, sothat the heated air from the oven C may be conveyed to the spacesbetween the side walls l4 and 26 and I5 and 21 of the outer shell A andthe heater casing B, respectively. The pipes 65 have a tight fit withthe openings in the side walls of the heater casing B and the oven C sothat no fumes of air may pass therearound. A circulating fan 66 ismounted on the rear wall I3 of the outer shell A and communicates withthe space between the outer shell A and the heater casing B by an inletpipe =61.

A baflle 68, which may be in the form of an elongated strip, has itsforward end portion attached as at 69 by welding or the like to theinner face of the front wall 24 of the heater casing B. The baffle 68extends rearwardly and upwardly at an angle of the order of forty-fivedegrees to the front wall 24 in the space between the side wall 21 and5| of the heater casing B and the oven C, respectively. The rear end ofthe bafile B8 terminates short of the rear wall 25 of the heater casingB and the side edges of the baflle are attached to the inner and outerfaces of the side walls 2! and 5|, respectively, as by welding or thelike.

A baflle 19 which may be similar in shape and construction to the baflle68 has its rear edge attached by welding or the like, as indicated at1|, to the inner face of the rear wall 25 of the heater casing B. Thebaflle extends forwardly and downwardly at an angle of the order offorty-five degrees to the rear Wall 25 and substantially parallel to thebaffle 98. The major portion of the baffie '10 is disposed in spacedapart vertical alignment with the major portion of the bafile 68 and thelower forward end of the bafile l0 terminates short of the front wall 24of the heater casing B. The side edges of the bafile 10 are attached tothe inner and outer faces of the side walls 2'! and 5| of the heatercasing B and the oven C, respectively.

Bafiles II and 1'2 which are similar in structure and arrangement to thebaflles 68 and T8, respectively, are disposed in the space between theside walls 25 and 59 of the heater casing B and the oven C,respectively.

An escape vent 13 for the fumes from the heating unit 3| extends throughsuitable openings in the rear walls I 3 and 25 of the outer shell A andthe heater casing B. The inner end of the vent I3 communicates with theinterior of the casing B and its outer end exhausts to the outsideatmosphere.

When the heater or furnace is to be employed for heating room remotefrom thefurnace, in lieu of the perforations I9, 29 and 2|, the pipes 65are extended through and outwardly of the side walls l4 and I5 of theouter shell A. The outer extended ends of the pipes 55 are connected toconduits 14 which lead to the room to be heated. A door is disposed inthe front wall l2 of the outer shell A.

The heater or furnace may be made of any size suitable for the area tobe heated. For example, the unit for a five room house would measure 46inches in height, 24 inches in width and inches in depth. These are thedimensions for the outside shell A. In this size unit the casing B wouldbe inches in height, 18 inches in width and 16 inches in depth and themeasurements for the oven C would be 16 inches in height, 14 inches inwidth and 12 inches in depth.

The side walls I4 and I5 of the outer shell A are provided with louvresI1.

In the use of the device the blower forces fresh air through the conduit54 and through its end portion 56 into the lower portion of the oven Cagainst the under surface of the fresh air spreader 51. The fresh air asit passes through the heating unit 3| by means of the portion 56 of theconduit 54 will be preheated to some extent. The incoming fresh air willstrike the facets 60 of the cone shaped shaped member 59 and willthereby be directed against the vanes 6 i. The fresh air follows thereverse curvatures 62 and 63 of the vanes 6|. This arrangement causesthe air to take a tortuous path so that it is retained for a relativelylong period in contact with the bottom 49 of the oven C where it issubjected to the direct heat of the heating unit 3|. The heated air thenrises upwardly along the side walls 50 and 5| of the oven C and flowsoutwardly therefrom through the pipes 65. The pipes 65 deliver theheated air int-o the spaces between the side walls 14 and 26 and i5 and21 of the outer shell A and heater casing B, respectively. From thesespaces the air is forced outwardly through the perforations I9, and 2|by the circulating fan 66.

The fumes from the heating unit 6| will flow upwardly as indicated .bythe arrows 16 against the under surface of the baffle 68 and above andbelow the baflles 69 and I6, respectively. The fumes will then moveupwardly around the forward end of the baffle '16 and Will rise to theupper portion of the heater casing 13 and .be discharged from the vent13. The baffles H and 12 will exert a similar influence upon the fumescoming in contact therewith. With this arrangement a back and forthmovement is imparted to the fumes from the heating unit 3! so that theheated fumes are maintained in contact with the side walls of the ovenand heater casing for a relatively long period of time. This willmaterially increase the heating effect of the heating unit 3| upon theair in the oven and the air in the space between the outer shell A andthe heater casing B. Air for supporting the combustion of the heatingunit 3! flows through the cut away portions I1 and I8 of the outer shellA and through the perforations 36 in the bottom 23 of the heater casing13 and thence to the heating unit 3|.

It is obvious that various changes and modifications may be made in thedetails of construction and design of the above specifically describedembodiment of this invention without departing from the spirit thereof,such changes and modifications being restricted only by the scope of thefollowing claims.

What I claim is:

l. A gas circulating heater and furnace comprising an outer shell havingair inlet openings at its lower end, a heater casing mounted within theshell in spaced relation thereto and having air inlet openings in itslower end, an air heating oven mounted within the casing adjacent theupper end thereof and in spaced relation thereto, said oven having abottom wall formed with an opening, a burner unit disposed within thecasing and underlying the bottom of the oven and comprising an enclosedcasing including spaced apart upper and lower walls the upper of saidwalls having burner orifices therethrough, means for supplying fuel tothe space between said upper and lower walls, said burner unit wallshaving vertically aligned openings therethrough, a fresh air inlet ductextending through said shell and casing and having a substantial portiondisposed within said heater casing and adjacent to said burner unit,said duct also having a portion extending upwardly through the openingsin the walls of the burner unit and communicating with the opening inthe bottom Wall of the oven, an air spreader mounted on the bottom ofthe oven and transversely overlying the opening to cause the air to flowtransversely over the bottom of the oven, conduit means conveying heatedair currents from the oven to the space between the casing and shell,and means for conducting the heated air currents from the space betweenthe casing and-shell and delivering them outwardly of said shell.

2. The combination of claim 1 wherein said oven is substantially airtight except for its fresh air inlet opening and its heated air conduitmeans and said conduit means includes tubes disposed transverselybetween the side walls of the oven and casing and in the space betweenthe oven and casing and said conducting means includes a circulating fancommunicating with the space between the casing and shell and said shellhaving openings in the side walls thereof.

SYLLUS D. TATE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 205,762 Phinney July 9, 1878241,959 Gard May 24, 1881 305,411 Vose Sept. 16, 1884 335,974 TaylorFeb. 9, 1886 358,432 Converse Mar. 1, 1887 621,665 Heil Mar. 21, 1899682,190 Haslett Sept. 10, 1901 932,953 Booth Aug. 31, 1909 1,647,315Scherer Nov. 1, 1927 1,651,668 Burmester Dec. 6, 1927 2,291,232 JubyJuly 28, 1942 2,302,751 Don Howe Nov. 24, 1942 2,328,030 Richards Aug.31, 1943 2,389,270 Miller Nov. 20, 1945

